import java.util.Scanner;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main
{
    public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int[] arr = new int[n + 1];
        int[] dp = new int[n + 1];
        for(int i = 1; i <= n; i++) {
            arr[i] = in.nextInt();
        }
        int ret = -101;
        for(int i = 1; i <= n; i++) {
            dp[i] = Math.max(dp[i - 1], 0) + arr[i];
            ret = Math.max(ret, dp[i]);
        }
        System.out.println(ret);
    }
}

